The linkup pics still aren't showing the actual linkup of the toy as far as I can see.
The arms are too close together in Armo Fighter, because the whole Legioss AND Tread are too "thin" in the center, compared to Toynami's sculpt: Chest, crotch and head should be wider in both toys. As it stands now, the arms must be in that position so they can link with the Tread.